Folding square



(No Model.)

H.. F. HEGEMAN.

FOLDING SQUARE 190.466,099. Patented 1300.29, 1891.

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UNITED STATES( PATENT OEEIcE.

HENRY F. IIEGEMAN, OF MILWAUKEE, VISOON SIN.

FOLDING SQUARE.

SPECIFICATION formingpart of Letters Patent No. 466,099, dated December29, 1891.

Application tiled June 8,1891. Serial No. 395,447. (No model.)

To all whom it may concern.-

I 3e it known that I, HENRY F. HEGEMAN, a citizen of the United States,and a resident of Mllwaukee, in the county of Milwaukee, and in theState of Wisconsin,have invented certain new and useful Improvements inSquares; and I do hereby declare that the following is a full, clear,and exact description thereof.

My invention relates to squares and it consists in certain peculiaritiesof construction and arrangement of parts to be hereinafter described,and pointed out in the appended claims.

In the drawings, Figure l represents a side elevation of a portion ofVmy square, partly broken away for the purpose of better illustration;Fig. 2, another side elevation of the device, showing the graduationsthereon; Fig. 3, a similar view showing one arm of the square folded onthe other; Fig. 4, a section on the line 4 4 of Fig. 1; Fig. 5, any edgeView of the vertical arm of my square, and Fig. 6 a section on the lineG 6 of Fig. 3; v

Referring to the drawings, A B represent the arms of aright-angledsquare constructed according to my invention, and projecting from theinner side of the arm A at a suitable distance from the lower endthereof is an ear a. A recess b is formed in the lower inner corner ofsaid arm A adjacent to the ear a and has passed transverselytherethrough a pin c for the purpose to be hereinafter described.

Extending along the entire length of the inner end of the arm B is agroove CZ, and pivoted within the upper portion of this groove by meansof a pin e is the ear a. In the lower portion of the groove CZ ispivoted, as by pin f, one end of a hook C, the other end of which isdesigned to engage with the pin c in the recess b of the square-arm A,the latter' end of the hook. being preferably notched for engagementwith the countersunk head of screw g, said screw holding the hook Ciirmly in place and guarding against any liability of dropping out ofits own weight.

Assuming that the parts are in the position shown in Fig. l and it isdesired to fold my Square, the screw g is run out a certain distance toclear the hook O and the latter disengaged from the pin c in the recessb of the square-arm A, and the square-arms are swung upon their pivotand brought together, as shown in Fig. 3. When desired to return theparts to their normal position, the squarearms are unfolded, the hook Cengaged with the pin c, and the screw g run down iush with the edge ofthe adjacent arm. l

Although I have shown and described the hook C held in place by thescrew g, it is obvious that this screw may be dispensed with, as thehook can be made to be heldin place by frictional contact against ltheopposing surfaces, or some other means may be'employed for the samepurpose.

The advantage of my square liesin the fact that by being enabled to foldthe same I economize space, and am thus enabled to place said squareentirely within a tool-box with the rest of the tools, and in case itrains none of the tools will get rusty, whilewith the square now in use,when placed in a toolbox, one arm thereof generally projects out of thetop of said box, and in case it rains the rain runs down the projectingarm of the square among the other tools and rusts them, as well as thesquare, and hence it will be seen that I have constructed a' simple andneat device that overcomes these objections, aswell as one that may bemore conveniently carried about than the ordinary non-jointedright-angled square.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

l. A right-angled square having one arm thereof provided with a grooveat its inner end, a hook pivoted in the lower end of the groove, theother arm having a recess in the lower inner corner,a pin passedtransversely through the recess for engagement with said hook, and anear projecting from the inner side of the latter arm and pivoted Withinthe groove of the first, substantially as set forth.

2. A right-angled square having an arm thereof provided with a groove atits inner end, a hook pivoted in the lower end of the groove, the otherarm having a recess in the lower inner eorner,a pin passed transverselythrough the recess Afor engagement with said` have hereunto set; myhand, at Milwaukee, in the county ol' Milwaukee and State of WistoCousin, in the presence of two witnesses.

HENRY F. HEGEMAN.

Witnesses:

H. G. UNDERWOOD, JOHN E. WILEs.

